The climate-controlled portable restroom trailer from Rugged Restrooms is made to withstand the harsh environment of North Dakota’s Bakken oilfields, where wind chills can dip to -65 degrees and summer temperatures top 100.

Unable to find an industrial-quality trailer that provided the durability and ease of use he sought, as well as the comfort his clients demanded, Rugged Restrooms co-owner Monty Lambert set out to build his own.

“We wanted a unit that wouldn’t freeze up where winters are 20 below,” he says.

The no-frills trailer features spray-on polyurethane insulation with R-21 walls and R-35 floor and ceilings. The interior and exterior are spray coated with Ultimate Lining polyurea coating for a seamless, waterproof, solvent- and acid-resistant finish. While no stranger to a wedding reception, the restrooms are most at home on a rustic job site.

“We don’t put a lot of lipstick on them, put it that way,” Lambert says. “The working guy isn’t going to spend a lot of time in the restroom, but he’s more than willing to kick the mud off his boots. We just needed something where we could go and pressure wash it out. It makes the cleanup real easy.”

The 13-foot trailers have two restrooms, each with a solid-core door and hands-free flushable toilet, urinal and sink with enough room to remove six layers of clothing.

The trailers are 6 feet 8 inches wide and 7 feet 4 inches tall. They are equipped with a 215-gallon waste tank, a 55-gallon freshwater tank and can accommodate two tanks for 110-gallon capacity in the 3 1/2-foot by 3-foot service room.

Other features include LED lighting, 6,000 Btu air conditioner, 500-watt, 120-volt heater (each side), motion-sensor forced-air hand dryers, in-swing doors to prevent wind damage and a tamper-resistant, wall-mounted thermostat. The insulated fiberglass exterior doors feature opening glass windows. Power is distributed by a 20-amp, 110-volt circuit.

“It’s very easy to find a 20-amp service, but if you go up to a 50-amp service, then you’re scrambling around,” Lambert says.

The dual-axle trailer (3,500 pounds per axle) has Bulldog jacks on each corner (3,000-pound static capacity) and electric brakes with seven-way plug. 406/214-9195; www.ruggedrestrooms.com.